Bryant 581A/B manual Power Exhaust Electrical Data

ELECTRICAL DATA

UNIT SIZE				NOMINAL	IFM	CONV	VOLTAGE RANGE		COMPRESSOR (each)				OFM (each)				IFM	COMBUSTION			POWER SUPPLY				MINIMUM UNIT
																		FAN MOTOR							DISCONNECT SIZE*
580F				V-PH-Hz	TYPE	OUTLET											FLA
							Min	Max	Qty	RLA	LRA		Qty			FLA			FLA		MCA		MOCP†		FLA		LRA
					STD	NO											3.5				25.2		35		24		106
			208/230-1-60			YES	187	254	1	16.2	96		1			1.4		0.6			31.2		35		30		111
					ALT	NO											4.9				26.6		40		26		111
						YES															32.6		40		31		116
					STD	NO											3.5				17.7		25		17		85
						YES															23.7		25		23		90
			208/230-3-60		ALT	NO	187	254	1	10.2	75		1			1.4	4.9	0.6			19.1		25		19		90
						YES															25.1		30		25		95
					HIGH	NO											5.2				19.4		25		19		109
036						YES															25.4		30		25		114
(3 Ton)					STD	NO											1.3				7.6		15		7		44
						YES															10.3		15		10		47
			460-3-60		ALT	NO	414	508	1	4.4	40		1			0.8	2.1	0.3			8.4		15		8		48
						YES															11.1		15		11		50
					HIGH	NO											2.6				8.9		15		9		57
						YES															11.6		15		11		59
					ALT	NO											1.9				7.1		15		7		37
			575-3-60			YES	518	632	1	3.7	31		1			0.6		0.3			9.3		15		9		39
					HIGH	NO											2.0				7.2		15		8		44
						YES															9.4		15		10		45
					STD	NO											3.5				34.0		40		32		129
			208/230-1-60			YES	187	254	1	23.3	118		1			1.4		0.6			40.0		45		38		134
					ALT	NO											4.9				35.4		45		34		133
						YES															41.4		50		40		138
					STD	NO											3.5				24.2		30		23		101
						YES															30.2		35		29		106
			208/230-3-60		ALT	NO	187	254	1	15.4	90		1			1.4	4.9	0.6			25.6		30		25		105
						YES															31.6		35		30		110
					HIGH	NO											5.2				25.9		30		25		124
048						YES															31.9		35		31		129
(4 Ton)					STD	NO											1.8				13.0		20		13		51
						YES															15.7		20		15		53
			460-3-60		ALT	NO	414	508	1	8.3	45		1			0.8	2.1	0.3			13.3		20		13		53
						YES															16.0		20		15		55
					HIGH	NO											2.6				13.8		20		13		62
						YES															16.5		20		16		64
					ALT	NO											1.9				10.5		15		10		42
			575-3-60			YES	518	632	1	6.4	36		1			0.6		0.3			12.7		15		12		43
					HIGH	NO											2.0				10.6		15		10		49
						YES															12.8		15		12		50
				LEGEND									Determine percent of voltage imbalance.
FLA	—	Full Load Amps																7
HACR	— Heating, Air Conditioning and Refrigeration												% Voltage Imbalance = 100 x
																		457
IFM	— Indoor (Evaporator) Fan Motor																= 1.53%
LRA	—	Locked Rotor Amps
MCA	— Minimum Circuit Amps												This amount of phase imbalance is satisfactory as it is below the maximum allowable 2%.
MOCP — Maximum Overcurrent Protection													IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your local
NEC	— National Electrical Code
													electric utility company immediately.
OFM	— Outdoor (Condenser) Fan Motor
RLA	—	Rated Load Amps										3. For units with power exhaust: If a single power source is to be used, size wire to include
*Used to determine minimum disconnect per NEC.													power exhaust MCA and MOCP. Check MCA and MOCP when power exhaust is powered
													through the unit (must be in accordance with NEC and/or local codes). Determine the new
†Fuse or HACR circuit breaker.
													MCA including the power exhaust using the following formula:
NOTES:
													MCA New = MCA unit only + MCA of Power Exhaust
1. In compliance with NEC requirements for multimotor and combination load equipment (refer
													For		example,		using a	580F060 unit		with MCA			= 28.9 and MOCP = 35, with
to NEC Articles 430 and 440), the overcurrent protective device for the unit shall be fuse or
													CRPWREXH030A01 power exhaust.
HACR breaker. Canadian units may be fuse or circuit breaker.
2. Unbalanced 3-Phase Supply Voltage													MCA New = 28.9 amps + 1.6 amps = 30.5 amps
Never operate a motor where a phase imbalance in supply voltage is greater than 2%. Use													If the new MCA does not exceed the published MOCP, then MOCP would not change. The
the following formula to determine the percent of voltage imbalance.
													MOCP in this example is 35 amps, the MCA New is below 35, therefore the MOCP is
% Voltage Imbalance													acceptable. If “MCA New” is larger than the published MOCP, raise the MOCP to the next
				max voltage deviation from average voltage									larger size. For separate power, the MOCP for the power exhaust will be 15 amps per NEC.
= 100 x																	POWER EXHAUST ELECTRICAL DATA
					average voltage
Example: Supply voltage is 460-3-60.
				AB = 452 v																							MOCP
														POWER EXHAUST				APPLICATION		MCA			MCA	MCA		(separate
				BC = 464 v												PART NO.		USAGE		(230 V)		(460 V)		(575 V)		power source
				AC = 455 v																							only)
				Average Voltage =		452 + 464 + 455								CRPWREXH030A01				036-073*		1.6			N/A	0.64		15
						3								CRPWREXH021A01				036-073		N/A		0.68			N/A	15
						1371								CRPWREXH022A01				090-151*		3.4			N/A	1.32		15
					=									CRPWREXH023A01				090-151		N/A		1.4			N/A	15
						3
														CRPWREXH028A01					ALL*	1.7			N/A	0.68		15
					= 457
														CRPWREXH029A01					ALL	N/A		0.7			N/A	15
Determine maximum deviation from average voltage.
(AB) 457 – 452 = 5 v														*Single or three phase.
(BC) 464 – 457 = 7 v
(AC) 457 – 455 = 2 v

Maximum deviation is 7 v.

580F036-151

75